<?php

/**
 * @file
 * User page callbacks for the profile module.
 */

/**
 * Menu callback; display a list of user information.
 */
function profile_browse() {
	// Ensure that the path is converted to 3 levels always.
	list(, $name, $value) = array_pad(explode('/', $_GET['q'], 3), 3, '');

	$field = db_query("SELECT DISTINCT(fid), type, title, page, visibility FROM {profile_field} WHERE name = :name", array(':name' => $name))->fetchObject();

	if ($name && $field->fid) {
		// Only allow browsing of fields that have a page title set.
		if (empty($field->page)) {
			drupal_not_found();
			return;
		}
		// Do not allow browsing of private and hidden fields by non-admins.
		if (!user_access('administer users') && ($field->visibility == PROFILE_PRIVATE || $field->visibility == PROFILE_HIDDEN)) {
			drupal_access_denied();
			return;
		}

		// Compile a list of fields to show.
		$fields = db_query('SELECT name, title, type, weight, page FROM {profile_field} WHERE fid <> :fid AND visibility = :visibility ORDER BY weight', array(
				':fid' => $field->fid,
				':visibility' => PROFILE_PUBLIC_LISTINGS,
		))->fetchAll();

		$query = db_select('users', 'u')->extend('PagerDefault');
		$query->join('profile_value', 'v', 'u.uid = v.uid');
		$query
		->fields('u', array('uid', 'access'))
		->condition('v.fid', $field->fid)
		->condition('u.status', 0, '<>')
		->orderBy('u.access', 'DESC');

		// Determine what query to use:
		$arguments = array($field->fid);
		switch ($field->type) {
			case 'checkbox':
				$query->condition('v.value', 1);
				break;
			case 'textfield':
			case 'selection':
				$query->condition('v.value', $value);
				break;
			case 'list':
				$query->condition('v.value', '%' . db_like($value) . '%', 'LIKE');
				break;
			default:
				drupal_not_found();
				return;
		}

		$uids = $query
		->limit(20)
		->execute()
		->fetchCol();

		// Load the users.
		$users = user_load_multiple($uids);

		$content = '';
		foreach ($users as $account) {
			$profile = _profile_update_user_fields($fields, $account);
			$content .= theme('profile_listing', array('account' => $account, 'fields' => $profile));
		}
		$output = theme('profile_wrapper', array('content' => $content));
		$output .= theme('pager');

		if ($field->type == 'selection' || $field->type == 'list' || $field->type == 'textfield') {
			$title = strtr(check_plain($field->page), array('%value' => drupal_placeholder($value)));
		}
		else {
			$title = check_plain($field->page);
		}

		drupal_set_title($title, PASS_THROUGH);
		return $output;
	}
	elseif ($name && !$field->fid) {
		drupal_not_found();
	}
	else {
		// Compile a list of fields to show.
		$fields = db_query('SELECT name, title, type, weight, page, visibility FROM {profile_field} WHERE visibility = :visibility ORDER BY category, weight', array(':visibility' => PROFILE_PUBLIC_LISTINGS))->fetchAll();

		// Extract the affected users:
		$query = db_select('users', 'u')->extend('PagerDefault');
		$uids = $query
		->fields('u', array('uid', 'access'))
		->condition('u.uid', 0, '>')
		->condition('u.status', 0, '>')
		->orderBy('u.access', 'DESC')
		->limit(20)
		->execute()
		->fetchCol();
		$users = user_load_multiple($uids);
		$content = '';
		foreach ($users as $account) {
			$profile = _profile_update_user_fields($fields, $account);
			$content .= theme('profile_listing', array('account' => $account, 'fields' => $profile));
		}
		$output = theme('profile_wrapper', array('content' => $content));
		$output .= theme('pager');

		drupal_set_title(t('User list'));
		return $output;
	}
}

/**
 * Callback to allow autocomplete of profile text fields.
 */
function profile_autocomplete($field, $string) {
	$matches = array();
	$autocomplete_field = (bool) db_query_range("SELECT 1 FROM {profile_field} WHERE fid = :fid AND autocomplete = 1", 0, 1, array(':fid' => $field))->fetchField();
	if ($autocomplete_field) {
		$values = db_select('profile_value')
		->fields('profile_value', array('value'))
		->condition('fid', $field)
		->condition('value', db_like($string) . '%', 'LIKE')
		->groupBy('value')
		->orderBy('value')
		->range(0, 10)
		->execute()->fetchCol();
		foreach ($values as $value) {
			$matches[$value] = check_plain($value);
		}
	}

	drupal_json_output($matches);
}
